What about performance and scalability? Doesn't python (with psyco and soon, unladen swallow) win big here? When you choose a platform, it's important to choose one that won't limit you when you start having users on a large scale...
That's immaterial in this debate, isn't it? Django doesn't run on Python 3, and Python 3 is still slower than Python 2 (though they're starting to focus on performance improvements in Python 3 with every new release).